rails ban

def ban
  if Messagebox.find_by_id(params[:messagebox]) == Messagebox.find_by_user_id(current_user.id)
    @ban = Ban.create(:user_id => params[:user], :messagebox_id => params[:messagebox], :creator => current_user)
    @ban.save
    respond_to do |format|
      format.html { redirect_to :back }
      format.json { head :no_content }
    end
  else
    redirect_to '/messagebox'
  end
end

def unban
  if Messagebox.find_by_id(params[:messagebox]) == Messagebox.find_by_user_id(current_user.id)
    @ban = Ban.find_by_user_id_and_messagebox_id(params[:user], params[:messagebox])
    @ban.destroy
    respond_to do |format|
      format.html { redirect_to :back }
      format.json { head :no_content }
    end
  else
    redirect_to '/messagebox'
  end
end

def banip
  if Messagebox.find_by_id(params[:messagebox]) == Messagebox.find_by_user_id(current_user.id)
    @user = User.find_by_id(params[:user])
    @ban = Ban.create(:ip => @user.last_sign_in_ip, :messagebox_id => params[:messagebox], :creator => current_user)
    @ban.save
    respond_to do |format|
      format.html { redirect_to :back }
      format.json { head :no_content }
    end
  else
    redirect_to '/messagebox'
  end
end

def unbanip
  if Messagebox.find_by_id(params[:messagebox]) == Messagebox.find_by_user_id(current_user.id)
    @user = User.find_by_id(params[:user])
    @ban = Ban.find_by_ip_and_messagebox_id(@user.last_sign_in_ip, params[:messagebox])
    @ban.destroy
    respond_to do |format|
      format.html { redirect_to :back }
      format.json { head :no_content }
    end
  else
    redirect_to '/messagebox'
  end
end